Obesity Surgery

, Volume 28, Issue 10, pp 3213–3220 | Cite as

Weight Loss Surgery Reduces Healthcare Resource Utilization and All-Cause Inpatient Mortality in Morbid Obesity: a Propensity-Matched Analysis

  • Somashekar G. KrishnaEmail author
  • Varun Rawal
  • Claire Durkin
  • Rohan M. Modi
  • Alice Hinton
  • Zobeida Cruz-Monserrate
  • Darwin L. Conwell
  • Hisham Hussan
Original Contributions



There is a lack of population studies evaluating the impact of bariatric surgery (BRS) on all-cause inpatient mortality. We sought to determine the impact of prior BRS on all-cause mortality and healthcare utilization in hospitalized patients.


We analyzed the National Inpatient Sample database from 2007 to 2013. Participants were adult (≥ 18 years) inpatients admitted with a diagnosis of morbid obesity or a history of BRS. Propensity score-matched analyses were performed to compare mortality and healthcare resource utilization (hospital length of stay and cost).


There were 9,044,103 patient admissions with morbid obesity and 1,066,779 with prior BRS. A propensity score-matched cohort analysis demonstrated that prior BRS was associated with decreased mortality (OR = 0.58; 95% CI [0.54, 0.63]), shorter length of stay (0.59 days; P < 0.001), and lower hospital costs ($2152; P < 0.001) compared to morbid obesity. A subgroup of propensity score-matched analysis among patients with high-risk of mortality (leading ten causes of mortality in morbid obesity) revealed a consistently significant reduction in odds of mortality for patients with prior BRS (OR = 0.82; 95% CI [0.72, 0.92]).

Conclusion and Relevance

Hospitalized patients with a history of BRS have lower all-cause mortality and healthcare resource utilization compared to those who are morbidly obese. These observations support the continued application of BRS as an effective and resource-conscious treatment for morbid obesity.


Morbid obesity Bariatric surgery Inpatient mortality National inpatient sample Population database 


Funding Information

This work was funded in part by the Ohio State University College of Medicine Roessler Medical Student Research Scholarship (VR).

Compliance with Ethical Standards

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed Consent

For this type of study, formal consent is not required.

Conflict of Interest

The authors declare that they have no conflict of interest.

Supplementary material

11695_2018_3345_MOESM1_ESM.docx (58 kb)
ESM 1 (DOCX 57 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Somashekar G. Krishna
    • 1
    • 2
    Email author return OK on get
  • Varun Rawal
    • 3
  • Claire Durkin
    • 3
  • Rohan M. Modi
    • 4
  • Alice Hinton
    • 5
  • Zobeida Cruz-Monserrate
    • 1
    • 2
  • Darwin L. Conwell
    • 1
  • Hisham Hussan
    • 1
    • 2
  1. 1.Division of Gastroenterology, Hepatology and NutritionThe Ohio State University Wexner Medical CenterColumbusUSA
  2. 2.Comprehensive Cancer CenterThe Ohio State University Wexner Medical CenterColumbusUSA
  3. 3.Wexner Medical CenterThe Ohio State University College of MedicineColumbusUSA
  4. 4.Department of Internal MedicineThe Ohio State University Wexner Medical CenterColumbusUSA
  5. 5.Division of Biostatistics, College of Public HealthThe Ohio State University Wexner Medical CenterColumbusUSA

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